IEnumerator ScaleUp(Transform transform, float scaleMultiplier, float time) {

    var startTime = Time.time;
    var endTime = startTime + time;
    var startScale = transform.localScale;
    var targetScale = startScale * scaleMultiplier;

    while (Time.time < endTime) {

      var k = (Time.time - startTime) / time;

      transform.localScale = Vector3.Lerp(startScale, targetScale, k);

      yield return null;
    }

    transform.localScale = targetScale;

  }

// ....
StartCoroutine(ScaleUp(transform, 1.5f, 1f));

// transform.localScale += new Vector3(1.5F, 1.5F, 0);
transform.localScale = Vector3.MoveTowards(transform.localScale, new Vector3(1.5F, 1.5F, 0), 0.5f * Time.deltaTime);

float AddAngle(float original, float angle){
    var r = original + angle;
    if(r < 0) r = 360 + r;
    if(r > 360) r -= 360;
    return r;
}

var playerAngle = 0f;

Console.WriteLine(AddAngle(playerAngle, 45));
Console.WriteLine(AddAngle(playerAngle, 135));
Console.WriteLine(AddAngle(playerAngle, 225));
Console.WriteLine(AddAngle(playerAngle, 315));